Automatically-threading shuttle for looms



April 20 1926. 1,581,600

I. SNOW AUTOMATICALLY THREADING SHUTTLE FOR LOOMS Filed Dec. 11, 1925 I//\/l/ENTOR-.' og/aA/e A TTO RNEZY' Patented Apr. 20, 1926.

UNITED STATES PATENT OFFICE.

ISAAC SNOW, OF LAWRENCE, MASSACHUSETTS, ASSIGNOR TO DRAPER CORPORATION,

OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

AUTOMATIGALLY-THREADING SHUTTLE FOR LOOMS.

Application filed December 11, 1925.

To all whom it may com-amt:

Be it known that I, ISAAC SNow, a citizen of the United States, residingat Lawrence, in the county of Essex and State of Massachusetts, haveinvented an Improvement in Automatically-Threading Shuttles I for Looms,of which the following description, in connection with the accompanyingdrawings, is a specification like characters on the drawingsrepresenting like parts.

This invention relates to automatically threading shuttles for loomswhereby the shuttle is threaded while the loom continues to run.

In that type of automatically threading shuttles for looms shown anddescribed in the Stimpson Patent, No. 1,483,492, Feb. 12, 1924, thelongitudinally extending thread passage is provided with a threadcasting device which operates to cast the thread upwardly out of thethread passage on the occurrence of a loop or overthrow, and, as theshuttle is again picked, the thread returns to the control of thethreading block.

' When the shuttle is picked following replenishment, or after anoverthrow which has served to unthread or partially unthread theshuttle, the swirling action of the thread as it is drawn from thebobbin eifects a return of the thread into control of the thread castingand guiding device. It may happen at times, owing to the character ofthe thread in use, especially where it is of kinky character, that thethread may not at once pass into control of the thread casting andguiding device, and one of the purposes of the present invention is toprovide an automatically threading shuttle of the type indicated,wherein provision is made for taking control of the thread in case thethread casting and guiding device itself has failed to do so, so that onthe return of the shuttle to the replenishing side of the loom thethread may be drawn from the end of the bobbin and weaving continueuninterruptedly.

In accordance with the present invention, the thread casting and guidingdevice, which is located in the longitudinally extending thread passage,is provided with a Serial No. 74,737.

catch, so arranged that should the thread fail to pass into control ofthe thread castmg and guiding device, it will be engaged by the catchand withdrawn from the end of the bobbin as the shuttle returns to the,replenishing side of the loom.

The invention and novel combination of parts will best be made clearfrom the following description and the accompanying drawings of one goodform thereof.

In the drawings:

Fig. l is a plan View of the threading end of aloom shuttle containingthe present inventlon;

Fig. 2 is a perspective view of the threading block and thread castingand guiding device containing the present invention;

Fig. 3 is an enlarged detail view of the thread casting and guidingdevice with the associated catch; and

Fig. 4 is a side, perspective view of the thread casting and guidingdevice, showing a modified form.

The loom shuttle 1 is provided with the bobbin chamber 2 in which thefilling carrier or bobbin 3 is supported, preferably by holding jawsengaged with the head of the bobbin, but since such holding jaws andmanner of holding the bobbin in they shuttle forms no part of thepresent invention and may be of usual construction now well understood,it is not herein shown.

Frontward of the bobbin chamber 2, the shuttle is provided with athreading block receiving chamber 4 and the side delivery eye 5, andmounted in the threading blockreceiving chamber is the threading block 6which is provided with a longitudinally extending thread passage havingan unobstructed top opening for the ready entrance and exit of thethread.

As shown in the present instance of the invention, the side walls 7 and8 of the threading block define the longitudinally extending open threadpassage, and at the rear ends of the side walls 7 and 8 the block isinclined upwardly from the bobbin chamber as at 9 and 10, the purposebeing to prevent interference with the proper ballooning of the threadas it leaves the filling carrier or bobbin in the shuttle and tofacilitate the upward movement of the thread when it is cast upwardlyout of the longitudinally extending thread passage by the thread castingand guiding device.

The side wall 8 of the threading block which is adjacent the sidedelivery eye is provided with an apron 11, and frontwardly and laterallyextending end 12, constituting a thread director, and between the threaddirector and side delivery eye is a pas sageway 13 for the passage ofthe thread to the side delivery eye, substantially as indicated and morefully described in the patent to Stimpson hereinbefore mentioned. Y

The thread casting and guiding device 14 is located in thelongitudinally extending thread passage, and is herein shown asconstituted by a scroll preferably formed of sheet metal and havinga'base portion 15 which passes through a side opening inthe threadingblock and is receivedin a recess 16 under the lower wall of the block.The thread casting and guiding device or scroll 1 1 extends upwardly atone side of the thread passage, as at 17, and is then turned frontwardlyand laterally to cause the thread to be thrown upwardly on theoccurrence of a loop or overthrow as the shuttle is brought to rest inthe shuttle box. The function of the thread casting and guiding deviceor scroll 14 is substantially the same as that more fully described inthe Stimpson patent.

Upon ordinary operation of the loom, the thread casting and guidingdevice will take control of the thread on the first pick followingreplenishment, or on the pick following an overthrow with consequentpartial or complete unthreading of the shuttle, but at times (andespecially withkinky yarn) the thread casting and guiding device mayfail to hold the thread, or, if the thread is unduly kinky, it is liableto be disengaged from the thread casting and guiding device during theflight of the shuttle. This is especially observable when the shuttle ispicked from the filling replenishing side of the loom afterreplenishment or after par tial or complete unthreading of the shuttle,and the present invention contemplates a catch extending from the threadcasting and guiding device or scroll to take' control of the thread andact as a leader should the thread casting and guiding device or scrollfail to function, so that on the pick of the shuttle to the replenishingside of the loom, the thread may lead over the catch and be drawn fromthe end of. the bobbin without breaking the thread. i

As indicated more clearly in Figs. 2 and 3,"the scroll 14 has afrontwardly extending end portion 18 which terminates rear-ward of abridge 19 at the forward end of the thread passage, over which thethread leads on its way to the side delivery eye during weaving.

At the rear portion of the thread casting and guiding device or scroll 11 there is formed a thread catch 20 which, as indicated in Figs. 2 and3, is preferably constructed by providing a slot 21 in the rear endportion of the thread casting and guiding device or scroll. It issometimes desirable to carry the end portion 22 of the catch slightlybeyond the contour or rounded surface of the scroll 14, as more clearlyindicated in Figs. 2 and 3, the construction being such that as thethread is drawn from the end of the filling carrier or bobbin on thepick following replenishment or after complete or partial unthreading ofthe shuttle, the swirling thread will be engaged by the thread catch andbe guided by its swirling action into control of the thread casting andguiding device or scroll. If, however, owing to the kinky character ofthe yarn, the thread fails to pass into control of the thread castingand guiding device or scroll, or leaves such control during the flightof the shuttle from the replenishing side of the loom, the thread willbe engaged by the catch 20 and pass into the slotted portion 21, so thatas the shuttle is returned to the filling replenishing side of the loom,it will draw over thefront edge portion of the catch and not be broken.

The thread casting and guiding device, as hereinbefore noted, has theupwardly extending portion 17, and the rear edge portion of the catch 20extends laterally, as at 23, and frontwardly as at 24:, so that on theoccurrence of a loop or overthrow, when the shuttle is arrested in thereplenishing box, the thread will be cast upwardly out of the threadpassage.

The thread casting and guiding device or scroll 14 and the catch carriedthereby may be secured in cooperative relation with the threading blockby the usual transverse bolt which passes through the opening 25 of thethreading block and the opening 26 in the side portion of the threadcasting and guiding device or scroll, although it is obvious that othermeans may be employed to secure the thread casting and guiding device orscroll in operative position.

On the first pick of the shuttle following replenishment or an overthrowof the thread which may have partially I or wholly unthreaded theshuttle, the swirling action of the thread as it is withdrawn from thefilling carrier or bobbin will ordinarily cause the thread to move intocontrol of the thread casting and guiding device or scroll, but shouldthe yarn be unduly kinky or fail from other cause to pass into controlof the thread casting and guiding device or. scroll on such first pickof the shuttle, the catch 20 will engage the thread, especially if theend 22 thereof extends beyond or laterally of the scroll, and on thereturn of the shuttle to the replenishing side of the loom the threadwill draw over the front edge portion of the catch 20 in the slot 21 andbe withdrawn from the filling carrier or bobbin in the shuttle inadirection to prevent breakage of the thread.

The construction hereinbefore described constitutes the preferred formof the invention, but the thread catch may obviously be otherwiseformed, as for instance, 1n the manner indicated in Fig. 4. In themodification, Fig. 4, the thread casting and guiding device or scroll 14has its edge port on 17 adjacent the bobbin chamber extending upwardly,then laterally as at 27, and frontwardly as at 28, the effect being thatupon the occurrence of a loop or overthrow the thread will be castupwardly from the thread passage. In the construction indicated in Fig.4, the thread catch 29 extends from the side portion of the threadcasting and guiding device or scroll, and is shown as formed by punchingout a piece of the metal of the scroll and turning it outwardly about anaxis 80, the front edge portion of the catch as at 81 being roundedbackwardly to constitute a guide for the thread when the shuttle ispicked towards the replenishing side of the loom and has failed to passinto control of the thread casting and guiding device.

lVhat is claimed is:

1. In an automatically threading loom shuttle, the combination of athreading block having a longitudinally extending thread passage, athread casting device in the 1011- gitudinally extending thread passagefor casting the thread upwardly from the thread passage on theoccurrence of a loop or overthrow, and a catch carried by the threadcasting device to take control of the thread on the pick followingreplenishment in case the shuttle fails to be partially threaded on thatpick.

2. An automatically threading loom shut lle having a longitudinallyextending thread passage, a thread casting device in the longitudinallyextending thread passage "for casting the thread upwardly from thethread passage on the occurrence of a loop or overthrow as the shuttleis arrested, and a catch extending from the thread casting deviceadjacent its rear portion to take control of the thread in case theshuttle is unthreaded on its return to the replenishing side of theloom.

3. An automatically threading loom shuttle having a longitudinallyextending thread passage and side delivery eye, a

thread casting device in the thread passage for casting the threadupwardly from the passage on the occurrence of a loop or overthrow, anda thread catch extending from the thread casting device to take controlof the thread and act as a leader for the thread when the shuttle isunthreaded as it is picked towards the replenishing side of the loom.

4. An automatically threading loom shuttle, the combination of athreading block having an open longitudinally extending thread passage,a thread casting scroll in the thread passage for casting the threadupwardly from the thread passage on the occurrence of a loop oroverthrow, and a thread catch formed as a finger extending from thethread casting scroll to take control of and guide the thread in casethe thread fails to pass into control of the thread casting scroll.

5. In an automatically threading loom shuttle, the combination of athreading block having a longitudinally extending thread passage, athread casting scroll in the thread passage to cast the thread upwardlyfrom the thread passage 011 the occurrence of a loop or overthrow, theportion of the scroll adjacentthe bobbin chamber being slotted to form athread catch, for taking control of the thread should the shuttle failto be threaded on the pick following replenishment of filling or anoverthrow.

6. In an automatically threading loom shuttle, the combination of athreading block having a longitudinally extending thread passage, athread casting scroll in the thread passage to cast the thread upwardlyfrom the thread passage on the occurrence of a loop or overthrow, theportion of the scroll adjacent the bobbin chamber being slotted to forma thread catch extending laterally of the thread passage for takingcontrol of the thread should the shuttle fail to be threaded on the pickfollowing replenishment of filling or an overthrow.

7. In an automatically threading loom shuttle, the combination of athreading block having a longitudinally extending thread passage, athread casting device in the longitudinally extending thread passage forcasting the thread upwardly from the thread passage on the occurrence ofa loop or overthrow, and a catch carried by the thread casting deviceand having a backwardly extending front edge to take control of thethread on the pick following replenishment in case the shuttle fails tobe partially threaded on that pick.

In testimony whereof, I have signed my name to this specification.

ISAAC SNOW.

